TCP聊天程序学习笔记

背景知识

关于项目转换：VC 6.0工程向VS 2010转换的问题

网络编程基础：WS网络开发——第1篇

TCP程序

实现：该例子由客户端和服务器组成。实现的功能是客户端向服务器发送“MyTCP"字符串，服务器接收并显示该字符串。客户端发送数据后退出，服务器显示数据后退出。

服务器和客户端调用Windows Sockets API的过程如下图：

 工程截图：

两个工程中的stdafx.h与stdafx.cpp源码相同

stdafx.h

// stdafx.h : include file for standard system include files,//  or project specific include files that are used frequently, but//      are changed infrequently//#if !defined(AFX_STDAFX_H__E01B4F25_9E02_42E0_9E68_09D08D1C776F__INCLUDED_)#define AFX_STDAFX_H__E01B4F25_9E02_42E0_9E68_09D08D1C776F__INCLUDED_#if _MSC_VER > 1000#pragma once#endif // _MSC_VER > 1000#define WIN32_LEAN_AND_MEAN// Exclude rarely-used stuff from Windows headers#include <stdio.h>// TODO: reference additional headers your program requires here//{{AFX_INSERT_LOCATION}}// Microsoft Visual C++ will insert additional declarations immediately before the previous line.#endif // !defined(AFX_STDAFX_H__E01B4F25_9E02_42E0_9E68_09D08D1C776F__INCLUDED_)

stdafx.cpp

// stdafx.cpp : source file that includes just the standard includes//Server.pch will be the pre-compiled header//stdafx.obj will contain the pre-compiled type information#include "stdafx.h"// TODO: reference any additional headers you need in STDAFX.H// and not in this file

Server.cpp

// Server.cpp : Defines the entry point for the console application.//#include "StdAfx.h"#define  BUF_SZIE 64#include "winsock2.h"#pragma comment(lib, "ws2_32.lib")int main(int argc, char* argv[]){WSADATAwsd;//WSADATA变量SOCKETsServer;//服务器套接字SOCKETsClient;//客户端套接字SOCKADDR_INaddrServ;;//服务器地址charbuf[BUF_SZIE];//接收数据缓冲区intretVal;//返回值//初始化套结字动态库if (WSAStartup(MAKEWORD(2,2), &wsd) != 0){printf("WSAStartup failed!\n");return 1;}//创建套接字sServer = socket(AF_INET, SOCK_STREAM, 0);if(INVALID_SOCKET == sServer){printf("socket failed!\n");WSACleanup();//释放套接字资源;return  -1;}//服务器套接字地址 addrServ.sin_family = AF_INET;addrServ.sin_port = htons(4999);addrServ.sin_addr.s_addr = INADDR_ANY;//绑定套接字retVal = bind(sServer, (LPSOCKADDR)&addrServ, sizeof(SOCKADDR_IN));if(SOCKET_ERROR == retVal){printf("bind failed!\n");closesocket(sServer);//关闭套接字WSACleanup();//释放套接字资源;return -1;}//开始监听 retVal = listen(sServer, 1);if(SOCKET_ERROR == retVal){printf("listen failed!\n");closesocket(sServer);//关闭套接字WSACleanup();//释放套接字资源;return -1;}//接受客户端请求sockaddr_in addrClient;int addrClientlen = sizeof(addrClient);sClient = accept(sServer,(sockaddr FAR*)&addrClient, &addrClientlen);if(INVALID_SOCKET == sClient){printf("accept failed!\n");closesocket(sServer);//关闭套接字WSACleanup();//释放套接字资源;return -1;}//接收客户端数据ZeroMemory(buf, BUF_SZIE);retVal = recv(sClient, buf, BUF_SZIE, 0);if (SOCKET_ERROR == retVal){printf("recv failed!\n");closesocket(sServer);//关闭套接字closesocket(sClient);//关闭套接字WSACleanup();//释放套接字资源;return -1;}printf("%s\n", buf);//输出"MyTCP"//退出closesocket(sServer);//关闭套接字closesocket(sClient);//关闭套接字WSACleanup();//释放套接字资源;return 0;}

Client.cpp

// Client.cpp : Defines the entry point for the console application.//#include "StdAfx.h"#defineBUF_SZIE64#include "winsock2.h"#pragma comment(lib, "ws2_32.lib")int main(int argc, char* argv[]){WSADATAwsd;//WSADATA变量SOCKETsHost;//服务器套接字SOCKADDR_INservAddr;//服务器地址charbuf[BUF_SZIE];//接收数据缓冲区intretVal;//返回值//初始化套结字动态库if (WSAStartup(MAKEWORD(2,2), &wsd) != 0){printf("WSAStartup failed!\n");return -1;}//创建套接字sHost = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);if(INVALID_SOCKET == sHost){printf("socket failed!\n");WSACleanup();//释放套接字资源return  -1;}//设置服务器地址servAddr.sin_family =AF_INET;servAddr.sin_addr.s_addr = inet_addr("127.0.0.1");servAddr.sin_port = htons((short)4999);intnServAddlen  = sizeof(servAddr);//连接服务器retVal=connect(sHost,(LPSOCKADDR)&servAddr, sizeof(servAddr));if(SOCKET_ERROR == retVal){printf("connect failed!\n");closesocket(sHost);//关闭套接字WSACleanup();//释放套接字资源return -1;}//向服务器发送数据ZeroMemory(buf, BUF_SZIE);strcpy(buf, "MyTCP");retVal = send(sHost, buf, strlen(buf), 0);if (SOCKET_ERROR == retVal){printf("send failed!\n");closesocket(sHost);//关闭套接字WSACleanup();//释放套接字资源return -1;}//退出closesocket(sHost);//关闭套接字WSACleanup();//释放套接字资源return 0;}

执行结果：

源文件下载地址：http://download.csdn.net/detail/fengdongjingquan/6460763